Make regular backups of your most important data. Your backup doesn't have to be perfect. A bad backup is better than no backup!
More information
You should also think about important apps such as 2-factor apps or password managers when making your backup. The settings can usually be easily exported from these. If possible, use open-source backup software such as "Neo Backup". However, this requires root rights. However, a simple regular copy of your most important data on a USB stick is also a good start! Remember that "No Backup, No Mercy" is an arrogant attitude. Not everyone has the knowledge and technical capabilities for backups. Help each other!